For us Whitney newbs does "spending the night on the hill" mean the summit? If so I am curious why you would not just use the hut, it seems quaint unless of course you're sharing it with a loud snorer like myself.
To me, all it means is that he's doing an overnight trip, likely spending the night in one of the more hospitable places -- Outpost Camp or Trail Camp.
Except for the hardiest of animal-hikers, hauling overnight gear all the way to the summit is pretty tough. And then, unless he's well acclimated or is not as susceptible to the altitude, it would be a pretty miserable night anyway.
